Christina wrote this expression to describe the amount of money she has. 10 × y which situation could be described by this expression? a. christina only has dimes, but she does not know how many dimes she has. b. christina only has quarters, but she does not know how many quarters she has. c. christina only has nickels, but she does not know how many nickels she has. d. christina only has pennies, but she does not know how many pennies she has. question resources

The answer is a) Christina only has dimes, but she does not know how many dimes she has. The reason why is because 1 dime is equivalent to 10¢, so if she were to count the money she has she would have 10¢ x y

question says to graph a triangle (xyz) and reflect it over the line y=x to create triangle x'y'z'.

we know that line y=x has both coordinates equal like (1,1), (5,5) etc so we can easily graph that reflecting line.

description of transformation:

we can see that x and y coordinate gets switched after transformation like (2,8) changed to (8,2)

what do you notice about the two line segments you drew:

we see that line segments xp and x'p are of same length and perpendicular to the reflecting line y=x.

do you think you would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line? :

yes, i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line.

how do you know? :

by measuring the length of yk and y'k.